811380 has 24 divisors (see below), whose sum is σ = 2272032. Its totient is φ = 216352.

The previous prime is 811379. The next prime is 811387. The reversal of 811380 is 83118.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6702 + ... + 6821.

It is an arithmetic number, because the mean of its divisors is an integer number (94668).

2⁸¹¹³⁸⁰ is an apocalyptic number.

It is an amenable number.

811380 is an abundant number, since it is smaller than the sum of its proper divisors (1460652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

811380 is a wasteful number, since it uses less digits than its factorization.

811380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13535 (or 13533 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 811380 is about 900.7663404013. The cubic root of 811380 is about 93.2698831787.

Adding to 811380 its reverse (83118), we get a palindrome (894498).

The spelling of 811380 in words is "eight hundred eleven thousand, three hundred eighty".